# Document and Data Source Questions
### **How can I extract patent data from ChEMBL?**
*On the interface:*
Select the documents view from the main ChEMBL homepage -
Use the lefthand filter panel to select patents -
*Local version of the database:*
Selected patent data is available in ChEMBL under SRC\_ID 38. Patent data from Binding DB is included under SRC\_ID 37.
Details on the selection of patents can be found in this [publication](https://pubmed.ncbi.nlm.nih.gov/37151295/).
### How do I perform a document similarity search?
More details can be found in this [Blog post](https://chembl.blogspot.com/2013/09/document-similarity-in-chembl.html).
We also have an API endpoint:
### What data sources are stored in ChEMBL?
ChEMBL consists of data from a wide variety of data sources including scientific literature and patents, deposited data sets, PubChem BioAssay and BindingDB databases, toxicology data sets and drug/clinical candidate resources. The current list of sources is:
| Source | Source ID |
| ---------------------------------------------------------------- | :-------: |
| Scientific Literature | 1 |
| GSK Malaria Screening | 2 |
| Novartis Malaria Screening | 3 |
| St Jude Malaria Screening | 4 |
| Sanger Institute Genomics of Drug Sensitivity in Cancer | 5 |
| PDBe Ligands | 6 |
| PubChem BioAssays | 7 |
| Clinical Candidates | 8 |
| Orange Book | 9 |
| Guide to Receptors and Channels (DEPRECATED) | 10 |
| Open TG-GATEs | 11 |
| Manually Added Drugs | 12 |
| USP Dictionary of USAN and International Drug Names | 13 |
| Drugs for Neglected Diseases Initiative (DNDi) | 14 |
| DrugMatrix | 15 |
| GSK Published Kinase Inhibitor Set | 16 |
| MMV Malaria Box | 17 |
| TP-search Transporter Database | 18 |
| Harvard Malaria Screening | 19 |
| WHO-TDR Malaria Screening | 20 |
| Deposited Supplementary Bioactivity Data | 21 |
| GSK Tuberculosis Screening | 22 |
| Open Source Malaria Screening | 23 |
| Millipore Kinase Screening (DEPRECATED - MERGED WITH SRC\_ID = 1 | 24 |
| External Project Compounds | 25 |
| Gene Expression Atlas Compounds | 26 |
| AstraZeneca Deposited Data | 27 |
| FDA Approval Packages | 28 |
| GSK Kinetoplastid Screening | 29 |
| K4DD Project | 30 |
| Curated Drug Metabolism Pathways | 31 |
| St Jude Leishmania Screening | 32 |
| Gates Library compound collection | 33 |
| MMV Pathogen Box | 34 |
| HeCaToS Compounds | 35 |
| Withdrawn Drugs | 36 |
| BindingDB Database | 37 |
| Patent Bioactivity Data | 38 |
| Curated Drug Pharmacokinetic Data | 39 |
| CO-ADD antimicrobial screening data | 40 |
| WHO Anatomical Therapeutic Chemical Classification | 41 |
| British National Formulary | 42 |
| Published Kinase Inhibitor Set 2 | 43 |
| Kuster lab chemical proteomics drug profiling | 48 |
| HESi | 49 |
| Winzeler Lab Plasmodium Screening Data | 51 |
| SARS-CoV-2 Screening Data 2020-21 | 52 |
| Prodrug active ingredients | 53 |
| Donated Chemical Probes - SGC Frankfurt | 54 |
| EUbOPEN Chemogenomic Library | 55 |
| Salvensis and LSHTM Schistosomiasis screening data | 56 |
| IMI-CARE SARS-CoV-2 Data | 57 |
| Fraunhofer HDAC6 | 59 |
| MMV Malaria HGL | 60 |
| International Nonproprietary Names | 63 |
| Cardiff Schistosomiasis Dataset 2023 | 64 |
| Literature data from EUbOPEN Chemogenomic Library | 65 |
